package fastJson.test; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONArray; public class FastJsonTest1 { /** * 数组转json格式字符串 */ public void array2Json(){ String[] arr = {"bill","green","maks","jim"}; String jsonText = JSON.toJSONString(arr, true); System.out.println("array2Json()方法：jsonText=="+jsonText); // 输出结果：jsonText==["bill","green","maks","jim"] } /** * json格式字符串转数组 */ public void json2Array(){ String jsonText = "["bill","green","maks","jim"]"; JSONArray jsonArr = JSON.parseArray(jsonText); System.out.println("json2Array()方法：jsonArr=="+jsonArr); // 输出结果：jsonArr==["bill","green","maks","jim"] } /** * 数组转json格式字符串 */ public void array2Json2(){ User user1 = new User("P001","TOM",16); User user2 = new User("P002","JACKSON",21); User user3 = new User("P003","MARTIN",20); User[] userArr = {user1,user2,user3}; String jsonText = JSON.toJSONString(userArr, true); System.out.println("array2Json2()方法：jsonText=="+jsonText); //输出结果：jsonText==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}] } /** * json格式字符串转数组 */ public void json2Array2(){ String jsonText = "[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]"; JSONArray jsonArr = JSON.parseArray(jsonText); System.out.println("json2Array2()方法：jsonArr=="+jsonArr); // 输出结果：jsonArr==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}] } /** * list集合转json格式字符串 */ public void list2Json(){ List list = new ArrayList(); User user1 = new User("L001","TOM",16); list.add(user1); User user2 = new User("L002","JACKSON",21); list.add(user2); User user3 = new User("L003","MARTIN",20); list.add(user3); String jsonText = JSON.toJSONString(list, true); System.out.println("list2Json()方法：jsonText=="+jsonText); //输出结果：jsonText==[{"age":16,"id":"L001","name":"TOM"},{"age":21,"id":"L002","name":"JACKSON"},{"age":20,"id":"L003","name":"MARTIN"}] } /** * list集合转json格式字符串 */ public void list2Json2(){ List list = new ArrayList(); Address address1 = new Address("广东省","深圳市","科苑南路","580053"); User user1 = new User("L001","TOM",16,address1); list.add(user1); Address address2 = new Address("江西省","南昌市","阳明路","330004"); User user2 = new User("L002","JACKSON",21,address2); list.add(user2); Address address3 = new Address("陕西省","西安市","长安南路","710114"); User user3 = new User("L003","MARTIN",20,address3); list.add(user3); String jsonText = JSON.toJSONString(list, true); System.out.println("list2Json2()方法：jsonText=="+jsonText); //输出结果：jsonText==[{"address":{"city":"深圳市","post":"580053","province":"广东省","street":"科苑南路"},"age":16,"id":"L001","name":"TOM"},{"address":{"city":"南昌市","post":"330004","province":"江西省","street":"阳明路"},"age":21,"id":"L002","name":"JACKSON"},{"address":{"city":"西安市","post":"710114","province":"陕西省","street":"长安南路"},"age":20,"id":"L003","name":"MARTIN"}] } /** * map转json格式字符串 */ public void map2Json(){ Map map = new HashMap(); Address address1 = new Address("广东省","深圳市","科苑南路","580053"); map.put("address1", address1); Address address2 = new Address("江西省","南昌市","阳明路","330004"); map.put("address2", address2); Address address3 = new Address("陕西省","西安市","长安南路","710114"); map.put("address3", address3); String jsonText = JSON.toJSONString(map, true); System.out.println("map2Json()方法：jsonText=="+jsonText); //输出结果：jsonText=={"address1":{"city":"深圳市","post":"580053","province":"广东省","street":"科苑南路"},"address2":{"city":"南昌市","post":"330004","province":"江西省","street":"阳明路"},"address3":{"city":"西安市","post":"710114","province":"陕西省","street":"长安南路"}} } public static void main(String[] args) { FastJsonTest1 test = new FastJsonTest1(); //数组转json格式字符串 test.array2Json(); //json格式字符串转数组 test.json2Array(); //数组转json格式字符串 test.array2Json2(); //json格式字符串转数组 test.json2Array2(); //list集合转json格式字符串 test.list2Json(); //list集合转json格式字符串 test.list2Json2(); //map转json格式字符串 test.map2Json(); } }
控制台输出结果：
array2Json()方法：jsonText==["bill","green","maks","jim"] json2Array()方法：jsonArr==["bill","green","maks","jim"] array2Json2()方法：jsonText==[{ "age":16, "id":"P001", "name":"TOM" },{ "age":21, "id":"P002", "name":"JACKSON" },{ "age":20, "id":"P003", "name":"MARTIN" }] json2Array2()方法：jsonArr==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}] list2Json()方法：jsonText==[ { "age":16, "id":"L001", "name":"TOM" }, { "age":21, "id":"L002", "name":"JACKSON" }, { "age":20, "id":"L003", "name":"MARTIN" } ] list2Json2()方法：jsonText==[ { "address":{ "city":"深圳市", "post":"580053", "province":"广东省", "street":"科苑南路" }, "age":16, "id":"L001", "name":"TOM" }, { "address":{ "city":"南昌市", "post":"330004", "province":"江西省", "street":"阳明路" }, "age":21, "id":"L002", "name":"JACKSON" }, { "address":{ "city":"西安市", "post":"710114", "province":"陕西省", "street":"长安南路" }, "age":20, "id":"L003", "name":"MARTIN" } ] map2Json()方法：jsonText=={"address1":{ "city":"深圳市", "post":"580053", "province":"广东省", "street":"科苑南路" },"address2":{ "city":"南昌市", "post":"330004", "province":"江西省", "street":"阳明路" },"address3":{ "city":"西安市", "post":"710114", "province":"陕西省", "street":"长安南路" }}
附：javabean类 User.java [java] view plaincopy package fastJson.test; import java.io.Serializable; public class User implements Serializable { private static final long serialVersionUID = 1L; private String id; private String name; private int age; private Address address; public User() { super(); } public User(String id, String name, int age) { super(); this.id = id; this.name = name; this.age = age; } public User(String id, String name, int age, Address address) { super(); this.id = id; this.name = name; this.age = age; this.address = address; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Address getAddress() { return address; } public void setAddress(Address address) { this.address = address; } } Address.java [java] view plaincopy package fastJson.test; import java.io.Serializable; public class Address implements Serializable { private static final long serialVersionUID = 1L; private String province; private String city; private String street; private String post; public Address() { super(); } public Address(String province, String city, String street, String post) { super(); this.province = province; this.city = city; this.street = street; this.post = post; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getPost() { return post; } public void setPost(String post) { this.post = post; } public String getProvince() { return province; } public void setProvince(String province) { this.province = province; } public String getStreet() { return street; } public void setStreet(String street) { this.street = street; } }
转自 http://blog.csdn.net/hu_shengyang/article/details/8447787 谢谢分享